Standard/OEIn stock
$12.52
10 items in stock
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14-WC37048• Rear• Drum Brake Wheel Cylinder
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GeoBrakes carries OEM-grade drum brake wheel cylinders confirmed to fit the Pontiac Catalina, the hydraulic actuators at the top of each drum brake assembly that convert brake fluid pressure into the mechanical force that pushes the Catalina shoes against the drum. Available in new and remanufactured options for your Catalina, every cylinder is bored to OEM specifications
Standard/OE$12.52
10 items in stock
Select your vehicle to see compatible products and accurate pricing
The drum brake wheel cylinder on the Pontiac Catalina is the hydraulic component that actuates your Catalina drum brake shoes every time you press the brake pedal. Brake fluid pressure from the master cylinder enters the Catalina wheel cylinder and acts equally on two opposed pistons, pushing them outward simultaneously toward each shoe on the Pontiac Catalina. A leaking Catalina wheel cylinder actively bleeds hydraulic pressure from the brake circuit and contaminates the brake shoes with fluid, both of which directly compromise your ability to stop the Pontiac Catalina.
Pontiac Catalina drum brake wheel cylinders are particularly vulnerable to corrosion in American road salt conditions. Salt water penetrates the dust boots over time on the Catalina, attacking the cylinder bore surface. Once the Pontiac Catalina bore is pitted, new piston cup seals cannot maintain a leak-free seal. Internally corroded Catalina cylinders must be replaced, not rebuilt. Vehicles in high-salt urban environments often require Catalina wheel cylinder replacement on the same service interval as brake shoes.
GeoBrakes stocks both new OEM-specification wheel cylinders and quality remanufactured units for the Pontiac Catalina. New cylinders are the stronger choice for Catalina vehicles in high-corrosion environments. Remanufactured units offer excellent value for Pontiac Catalina vehicles in moderate conditions where the original bore was sound. Our vehicle selector confirms the correct Catalina cylinder, right bore diameter, port location, and mounting configuration, for your Catalina drum brake assembly before purchase.
Can I drive my Pontiac Catalina with a leaking wheel cylinder?
No. A leaking Catalina cylinder actively loses hydraulic pressure from the brake circuit, reducing stopping force on your Pontiac Catalina over time. Brake fluid that reaches the Catalina shoes renders the friction material ineffective. A leaking Pontiac Catalina wheel cylinder is an immediate safety concern that requires urgent attention.
Should I replace both wheel cylinders on my Pontiac Catalina at the same time?
Yes. If one Catalina cylinder has leaked or seized due to age and corrosion, the cylinder on the opposite side of the Pontiac Catalina has experienced identical conditions and is at a similar stage of deterioration. Replacing both ensures balanced hydraulic pressure on your Catalina and avoids a second service call within months.
Do I need to bleed the brakes on my Pontiac Catalina after replacing a wheel cylinder?
Yes. Replacing a Catalina wheel cylinder opens the hydraulic circuit, allowing air to enter. After installation on the Pontiac Catalina, the entire rear brake circuit must be bled to remove all air and restore a firm, consistent brake pedal on your Catalina.